Guys, could you please tell me why do we use linux and how can i install this.

Linux is used for enterprise level.

Well I have to have an OS on my computer, and I'm sure not going back to windows. You can install a distribution of gnu/linux by downloading an .iso file from your prefferred distribution and booting up your computer to it via cd/dvd or usb thumb drive. it will then ask you to install the OS to your hard drive.

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You can download linux iso files from here.
http://iso.linuxquestions.org/

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You can read up on the many, and varied, Linux distributions at distrowatch.com

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Mainly for security and ownership of the OS.

Windows doesn't work on its own. You need to install software from other profit-making companies which you don't know anything about.
Firewall, antivirus, Flash, javascript, web browser, email - they're all provided by other companies and these companies can be using some form of spyware.

Windows is vulnerable to virus and malware. Also, you don't really own Windows. You're using a 'service' instead.
With linux distros you own the OS - so you can customise the desktop interface, you can customise the OS to add/remove programs, you can even customise the linux kernel if you want.
You can kill the OS accidentally or on purpose and get a different linux OS for free (make sure you back up your personal data).
You can't do that with Windows.

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I suggest that you download and read one of these manuals (the Mate version is probably the best to get)
http://linuxmint.com/documentation.php
and then download and create the installation DVD or USB stick
http://linuxmint.com/download.php
and you can see what it's like and decide if you want to install it.

I suggested Mint as it's one of the most beginner-friendly: it has that manual, for a start!

Why?
1) It's free (free as in free speech and very often free as in free beer)
2) It's safe on the Internet: no worms, no viruses, no spyware
3) It's easy to learn how it works internally so you're not at the mercy of a system you don't understand.
4) It almost never crashes. Individual programs might crash if they're badly written but Linux as a whole doesn't. No blue screen of death.
5) You can easily update it because every Linux distribution has its own software repository (app store) and a package manager to use it.
6) You don't need to reboot it every time you update something.
7) There's a wonderful online community.

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With linux you can do things your own way, no strings attached! And btw it is free

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All of the above + +

I''ll defer to the several examples others have offered. And also note that your question is rather incomplete and ambiguous and your added comment:makes it much more ambiguous.

A suggestion is to elaborate better on your question. Because I use Linux in various forms, for various reasons. I interpret that Linux is on my phone even though it is Android, and I'm happy with that interpretation. I'm a developer of software and do plenty of work using Linux, configuring custom Linux builds, and programming within Linux. Meanwhile I use Linux as my desktop distribution because I've grown to prefer it. I don't really know what the term "Enterprise" means, except a series of historical ships and that it generally means a prospective business venture. I'm not a server person.

@OP, here more will be better, versus less. Rather than people slanting severely with their personal preferences (we will likely do that anyways ) but to get answers more focused on your original question's intentions.

Is that the "royal WE? "

why i do will be different than why you think you want to

please try and do even the bare minimal amount of RESEARCH!!!!!

A better question is: why in this world are we still using proprietary ones?

Because we put a fix to our computers.
We no likey crippled gear.

If it was not for drm software for drm hardware, I would be windows free.r

Edit: as far as installing. If this clueless scooter tramp can handle it. Anyone can.

https://www.howtoforge.com/

The better question is to the OP why are you even thinking about it? what possessed you to even venture such a thought of "why Linux?"

self questions such as this:

am I adaptive to new ways of thinking?
can I figure out how things work on my own or with little to no help?
am I fearful of the things I am working with allowing the object to control me and not I controlling the object?

Do I like to exercise my brain logically using deduction and process of elimination to try and make sense out of things that do not make scene at first glance in order to figure out why something is not doing what I expect it to?

Am i more adapt to using a GUI over a command line, or visa versa?

which do I enjoy more? Working in a "safe controlled environment" as apposed to working in an environment that I can change to better suit my needs.

Do I even possess any kind of technical background or am I fearful from learning how to use my mind to explore the question, "I wonder what will happen if I do this?" in order to find out? Then not panic too much when it blows up in your face.

Do I have a deeply rooted burning need within my soul to learn how to program, at least a little bit?

Do I like taking things apart just to see how they work, then put them back together again and see if they will still work afterwords?

Or is this curiosity all just driven by the "I just want to be in with the in (Linux) crowd?"

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